@mixin content1 {
  &:focus {
    @content;
  }
  
  &:hover {
    @content;
  }
}

@mixin content2 {
  &:active {
    @content(2px, #FFF);
  }
}

.button {
  @include content1 {
    width: 2px;
  }
  
  @include content2 using($size,$color) {
    height: $size;
    color: $color;
  }
}